Just to play devil's advocate, something like this is the worst-case scenario.
1: Ohio State (B1G champ)
2: Indiana (B1G runner up)
3: Georgia (SEC #3 but best resume)
4: A&M (SEC runner-up)
5: Ole Miss (SEC #4)
6: Oregon: (B1G #3)
7: Bama (SEC champ)
8: Oklahoma (SEC #5)
9: BYU (Big 12 champ)
10: Texas Tech or Miami (at-large)
11: Ga. Tech (ACC Champ)
12: G5 whoever
First out: Miami or Texas Tech
Second out: Notre Dame
It would require:
1: Ole Miss, Oregon and Oklahoma winning all remaining games.
2: Bama winning out and then beating A&M in the SEC title game
3: BYU winning out and then beating Texas Tech in the Big 12 title game, by a close enough margin that Tech is stlll at-large over us
4: Miami winning out, in style, but not making the ACC title game.
If two of those things don't happen, we're in. This is college football. Like five of them won't happen. We'll probably host in the first round.
You use very sound, rational, well thought out logic...But the pea brain part of me still thinks that this could still happen. I know things never work out perfectly in CFB but I've had disappointment before.
Oklahoma doesn't have the toughest test with a depleted LSU and Mizzou. Mississippi State is the worst SEC team over the last 5 years and Ole Miss can easily roll them. I always love seeing Oregon lose but Lincoln Riley does Lincoln Riley things and UW is hit or miss. Oregon could easily win both games going away.
A&M could (should) have lost to ND and could (should) have lost to SCar. Bama still controls it's destiny and can take down A&M. The Big12 is a mess so who knows, though BYU was thoroughly outclassed by TT the first time through. I'd really like to see some dominos fall this weekend to make the last week a bit easier to breathe and then the conference championship games inconsequential to ND.
On another note: In the big picture, do we want Pitt to beat Georgia Tech? Does that hurt ND in any way by letting Miami slip into ACC game or no? Of course we want Pitt to beat Miami, mostly for the lulz at this point.